Hylambates millsoni Boulenger, 1895 "1894", Proc. Zool. Soc. London, 1894: 644. Syntypes: BMNH (2 specimens), by original designation. Type locality: "mouths of the Niger", Nigeria.
Leptopelis millsoni — Noble, 1924, Bull. Am. Mus. Nat. Hist., 49: 244. Ahl, 1931, Das Tierreich, 55: 231.
Leptopelis guineensis Ahl, 1929, Sitzungsber. Ges. Naturforsch. Freunde Berlin, 1929: 200. Holotype: ZMB unnumbered according to the original publication; ZMB 20047, according to XXX. Type locality: "Makomo, Spanisch-Guinea". Synonymy by Perret, 1962, Rev. Zool. Bot. Afr., 65: 237; Perret, 1966, Zool. Jahrb., Jena, Abt. Syst., 93: 424.
Leptopelis (Leptopelis) millsoni — Laurent, 1941, Rev. Zool. Bot. Afr., 35: 94.
Niger Forest Treefrog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 69).
Rainforests of southeastern Nigeria and Gabon to eastern Dem. Rep. Congo; presumably in southwestern Central African Republic.
Removed from the synonymy of Leptopelis rufus by Ahl, 1931, Das Tierreich, 55: 231, where it had been placed by Noble, 1924, Bull. Am. Mus. Nat. Hist., 49: 242. See account by Laurent, 1973, Ann. Mus. R. Afr. Cent., Tervuren, Ser. Octavo, Sci. Zool., 202: 56-59. Possibly conspecific with Leptopelis macrotis according to Schiøtz, 1999, Treefrogs Afr.: 258. Gabon record by Lötters, Gossmann, Obame, and Böhme, 2001, Herpetofauna, Weinstadt, 23: 32. Frétey and Blanc, 2001, Bull. Soc. Zool. France, 126: 383, reported this species from Gabon. Schiøtz, 1963, Vidensk. Medd. Dansk Naturhist. Foren., 125: 87, provided records for Nigeria. See account for Cameroon by Amiet, 2012, Rainettes Cameroun: 506-512.
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